JHM88540-JHM88513 bearing: complete specifications & equivalents
The JHM88540-JHM88513 is a ANSI ABMA 19.2 radial bearing sized 30 x 72 x 29.37 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 30 mm |
| Outer diameter D | 72 mm |
| Width B | 29.37 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 80 kN |
| Basic static load rating C0 | 97 kN |
| Limiting speed (mechanical) | 5400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 620 g |
| Manufacturer designation | NTN 4T-JHM88540/JHM88513 |
| Standard | ANSI ABMA 19.2 |
| Catalog version | NTN 2203E 2026-09-25 |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN 2203E 2026-09-25) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN 2203E 2026-09-25); NTN® is a trademark of NTN Corporation, used here for identification only — mpnbase is not an authorized NTN distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at ntnglobal.com.
Dimensions in inches & 4t-inch-series range
| Bore d | 1.181 in |
|---|---|
| Outer diameter D | 2.835 in |
| Width B | 1.156 in |
| ISO bore code | 40 |
| Radial section height (D−d)/2 | 21 mm |
| Smallest bore in 4t-inch-series | 12.7 mm |
| Largest outer diameter in 4t-inch-series | 260 mm |
| Width range across 4t-inch-series | 10.998–77.788 mm |
| Bore position in 4t-inch-series (smallest first) | 27 of 148 |
| Bore above smallest 4t-inch-series size | 17.3 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| JHM88540 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the JHM88540-JHM88513 model number is decoded
4T-JHM88540/JHM88513 is the NTN 4T catalogue entry for a 30×72×29.37 mm inch tapered roller bearing — an ABMA-dimensioned cone/cup set, not an ISO 355 metric bearing, even though the table quotes metric equivalents. The 4T prefix is NTN's tapered roller quality mark stamped on both parts; it is a brand mark, not a size code, so cross-references quote JHM88540/JHM88513 without it. Catalogue mass of the 4T-JHM88540/JHM88513 cone-plus-cup set is 620 g; shaft and housing shoulders must carry that mass square to the axis during fitting. Housing fitment sequence for 4T-JHM88540/JHM88513: press the JHM88513 cup square into the 72 mm seat first, then bring the JHM88540 cone (on its 30 mm shaft) into adjustment — the two references are separate engineering parts that happen to ship as one set. The rollers run with their large ends against the cone's guide rib; lubricant must reach that rib face of 4T-JHM88540/JHM88513, not only the raceway, or the pair smears on the first overloaded start.
Typical equipment & failure modes
Common applications
- agricultural tractor transmission and PTO shafts
- industrial gearboxes built to inch shafting
- construction-equipment pivot and wheel positions
- mining and quarry conveyor drive pulleys
Known failure patterns
- rib-face scoring when the thrust share of the combined load exceeds what the cone rib of this size carries
- false brinelling on a stationary pair exposed to vibration during transport or standby
- preload loss and noise after one bearing of the adjusted pair is replaced without resetting end play
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- fretting corrosion on a loose cone seat that creeps under rotating load
Selection pitfalls — read before you substitute
- Hub and pinion positions of this 30 mm class are adjusted in pairs; verify end play against the axle or gearbox drawing and re-torque after bedding-in instead of trusting the first setting on 4T-JHM88540/JHM88513.
- The J-prefixed JHM88540 code belongs to a metric-envelope inch family: its 30 mm bore is a round metric figure, yet the part still follows ABMA cone/cup numbering — do not substitute an ISO 355 metric 302/322 bearing of the same bore without checking OD, T and contact angle.
- Quote the full JHM88540/JHM88513 pair at ordering: the JHM88540 cone also ships against sibling cups, and a cup from another reference changes the 29.37 mm assembled width and the rating.
- Inch and metric bores collide on paper — 30 mm is 1.181 in, not a round metric size; a metric bearing that seems 0.1 mm off will not seat on the inch shaft.
- Shaft and housing fillets must clear the ring chamfers of JHM88540 and JHM88513; use undercut shoulders so the rings seat on the face, not on a radius.
- The 80/97 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-JHM88540/JHM88513; internal geometry legitimately differs between inch-series makers, so re-verify ratings, adjustment and the exact cone/cup references before substituting another brand on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 4T-JHM88540/JHM88513?
4T-JHM88540/JHM88513 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 30 mm bore (1.181 in), 72 mm outside diameter and 29.37 mm assembled width T (2.835 × 1.156 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 80 kN, C0 97 kN, grease limiting speed 5,400 r/min, oil speed 7,100 r/min, mass about 620 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-JHM88540/JHM88513 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the JHM88540 cone or the JHM88513 cup can be replaced by an identical reference from NTN or another ABMA-dimensioned maker. Pairing the cone with a different cup reference is a different catalogue row: OD, assembled T and the 80/97 kN ratings change with the cup.
What is the difference between 4T-JHM88540/JHM88513 and a metric ISO 355 tapered bearing?
4T-JHM88540/JHM88513 follows the ABMA inch boundary plan with cone/cup references; ISO 355 bearings use metric dimension-series numbers (302, 322, …). Even where a metric size looks close to 30×72×29.37 mm, the envelopes and contact angles differ — the two systems are not drop-in interchangeable; check every boundary value before substituting.
What does the 4T prefix on 4T-JHM88540/JHM88513 mean?
4T is NTN's tapered roller bearing quality mark, stamped on cone and cup in the factory. It identifies NTN's 4T programme and is not a dimension or variant code, so interchange lists quote the bare JHM88540/JHM88513 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-JHM88540/JHM88513 list two speeds, 5,400 and 7,100 r/min?
The lower figure, 5,400 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 4T-JHM88540/JHM88513 at 7,100 r/min because oil removes rib-contact heat better. Real limits still depend on pair adjustment, oil flow and cooling.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN 2203E 2026-09-25 on 2026-10-01. Read our editorial & correction policy.